JPH0546152A - Method and device for enlarging character pattern - Google Patents

Abstract

PURPOSE:To enlarge character pattern data with optional scale factor by using a small amount of enlargement data, as to the method and device for enlarging the character pattern data to be displayed or printed. CONSTITUTION:For the enlargement of character pattern data consisting of F dots in one direction into character pattern data consisting of X dots in one direction, values M and I satisfying X=FM+I and 0<=I<F are found and an enlargement table wherein dots to be multiplied by M and dots to be multiplied by M+1 are determined for an optional value M is referred to for the respective values I to determine dots to be multiplied by M and dots to be multiplied by M+1, thereby enlarging the respective dots of the character pattern data to the determined scale factor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character pattern enlarging method and apparatus for enlarging pattern data of characters (including symbols) for display or printing.

[0002]

2. Description of the Related Art Pattern data of various sizes are required in response to a demand for improving the expressiveness of characters for display or printing on a computer or word processor.

Conventionally, a character pattern is enlarged by multiplying each dot by one or both of the vertical and horizontal directions.

This method is easy, but can be expanded only by an integral multiple.

Therefore, as shown in FIG. 8, line enlargement data LR, column enlargement data LC, line reduction data SR, and column reduction data SC are held for the character pattern data C of each character, and a non-integer multiple enlargement or It was shrinking. This character pattern data C is 16 × 16 dots, and by only doubling the rows and columns corresponding to the shaded portions in the row enlarged data LR and the column enlarged data LC, 19 × 1
It is possible to obtain character pattern data C of 9 dots.
Further, by omitting only the rows and columns corresponding to the shaded portions of the row reduced data SR and the column reduced data SC, 14 ×
14-dot character pattern data C can be obtained.

This method can appropriately enlarge or reduce each character. However, since it is necessary to hold the line expansion data LR, the column expansion data LC, the line contraction data SR, and the column contraction data SC for each character, the expansion / contraction data amount is too large. In addition, since the enlargement ratio is fixed, it is not possible to enlarge the character at an arbitrary ratio.

[0007]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a character pattern enlarging method and apparatus capable of enlarging character pattern data to an arbitrary magnification using a small amount of enlarging data. To provide.

[0008]

In the character pattern enlarging method according to the present invention, in order to enlarge the character pattern data of F dots in one direction to the character pattern data of X dots in one direction, X = FM + I , M such that 0 ≦ I <F
And I values are calculated, and among the F dots in the one direction before expansion, the FI dot is multiplied by M, and the remaining I dots are multiplied by M + 1.

FI dot is multiplied by M and I dot is increased by M + 1
If multiplied, (F−I) M + I (M + 1) = FM + I, so the F dots are enlarged to X dots. Enlarged data of which of the F dots is multiplied by M and which is multiplied by M + 1 with respect to an arbitrary character, X> F
For each I of 0 ≦ I <F, it is sufficient to have F bits, and the same amount of data as the pattern data of one character is sufficient. I = 0
In this case, each of the F dots has only to be multiplied by M, and therefore the expanded data need only have substantially F × (F−1) bits.

Therefore, the character pattern data can be magnified to an arbitrary magnification using a small amount of magnified data.

The above-mentioned enlargement data can be obtained by calculation every time, but for each value of I, an enlargement table is created in advance that defines a dot M times the arbitrary value M and a dot M times the M + 1. Then, if the enlargement magnification of each dot is determined with reference to this enlargement table, the enlargement processing can be performed quickly.

FIG. 1 shows the principle configuration of a character pattern enlarging device according to the present invention.

This character pattern enlarging device is for carrying out the above method, and in order to enlarge character pattern data of F dots in one direction to character pattern data of X dots in one direction, X = FM + I , M such that 0 ≦ I <F
And the calculation means 1 for obtaining the value of I, and the value of each I,
An enlargement table storage unit 2 that stores an enlargement table that defines a dot to be multiplied by M and a dot to be multiplied by M + 1 with respect to an arbitrary value M, and a dot to be multiplied by M and a dot to be multiplied by M + 1 are determined by referring to the enlargement table. Enlargement magnification determination means 3 for
Character font storage means 4 for storing pattern data of each character and converting a character code into character pattern data;
Enlarging means 5 for enlarging each dot of the converted character pattern data to the determined magnification.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

(1) One Embodiment of Character Pattern Enlargement Method FIGS. 2 and 3 are explanatory diagrams of a character pattern enlargement method.

Character pattern data C before enlargement is F × F dots, and character pattern data D after enlargement is X × X dots. This expansion is performed by referring to the expansion table A.

In the expansion table A, the same amount of data as the pattern data for one character is sufficient for all characters and for any integer X such that F <X. For example, when F = 8, the expansion table A is composed of 8 bytes. Expansion table A
The cells in the figure correspond to 1-bit data, and the cells without hatching indicate that the dots are multiplied by M (M is an integer) in the row and column directions. The attached cells represent that the dots are multiplied by M + 1 in the row and column directions.

Hereinafter, the data of the constituent elements of the character pattern data C and D, the enlargement table A and the enlargement magnification data B will be described as C [i] [j]: dot data of the i-th row and j-th column of the character pattern data C ( i = 0 to F-1, j = 0 to F-1) D [i] [j]: Dot data (i = 0 to X-1, j = 0) in the i-th row and j-th column of the character pattern data D -X-1) A [i] [j]: Bit data of the i-th row and j-th column of the expansion table A (i = 0 to F-1, j = 0 to F-1) B [i]: Character pattern It is referred to as the enlargement magnification of the dot on the i-th row and the i-th column of the data C. Also, * means all possible values of the variable. For example, A [i] [*] means all data in the i-th row of the expansion table A.

First, M is X = I + FM and 0 ≦ I <F
And I. For example, when F = 8 and X = 10,
M = 1 and I = 2.

B [j] = M + A [I] [j], j = 0 to
Ask for 7. In this example, A [I] [*] and B
[*] Are as shown in FIGS. 3B and 3C, respectively.
One line of the character pattern data before enlargement as shown in FIG. 3 (A) becomes as shown in FIG. 3 (D) when each dot is enlarged according to the enlargement magnification shown in FIG. 3 (C). The enlargement ratio of FIG. 3C represents not only the enlargement ratio in the row direction but also the enlargement ratio in the column direction. The enlargement ratio in the third and sixth rows of the character pattern data C is 2, and the other enlargement ratios are 2. The magnification in the column direction of the row is 1.

As shown in FIG. 2, when the F × F dot character pattern data C is enlarged according to such an enlargement ratio, the X × X dot character pattern data D is obtained.

FIG. 4 shows a pattern of the expansion table for 24 × 24 dot characters.

(2) First Embodiment of Character Pattern Enlarging Device FIG. 5 is a schematic hardware configuration diagram of the character pattern enlarging device.

In this apparatus, a CPU 10 is connected to a program memory 12, a text memory 13, a character font memory 14, an expansion table memory 15, a bit map buffer memory 16 and a printer interface 17 via a bus 11, and a printer interface 17 is provided. A printer 18 is connected. The text memory 13 stores a character code string to be printed and the number of dots X on one side after enlargement. The character font memory 14 stores F × F dot pattern data of each character. The expansion table memory 15 stores an expansion table A as shown in FIG. 2, for example. The CPU 10 reads a character code and the number of dots X on one side from the text memory 13 according to a program stored in the program memory 12, addresses the character font memory 14 with this character code, reads the character pattern data C, and expands the table. The character pattern data C is expanded with reference to the memory 15, and the expanded character pattern data D is stored in the bitmap buffer memory 16. Further, the data stored in the bitmap buffer memory 16 is supplied to the printer 18 via the printer interface 17 to print the text.

Next, the character pattern enlargement processing procedure will be described with reference to FIG. Hereinafter, the numerical value in parentheses () indicates the step identification number.

(20) M = X = I + FM, 0 ≦ I <F
And I.

(21) The array element identification variable i is initialized to 0.

(22) When i <F, the following step 23
The processing of up to 26 is repeated to determine the enlargement ratio B [*].

(23, 24) If A [I] [i] = 0, then B [I] = M.

(23, 25) If A [I] [i] = 1, then B [I] = M + 1.

(26) Increment i.

(27, 28) I = F in step 22
If both of the array element identification variables j and y are 0,
Initial setting to j, and the following processing is performed while j <F, and j = F
If so, the character pattern enlargement processing ends.

(29) D [Y] [*] = 0. Further, the array element identification variables i and x are both initialized to 0.

(30) When i <F, the following step 31
The process of up to 36 is repeated to perform the enlarging process in the row direction.

(31 to 33) If C [j] [i] = 1, the number of repetitions is set to k = 0, and while k <B [i], the following steps 34 and 35 are repeated to make dots The data C [j] [i] is expanded in the row direction.

(34) D [y] [x + k] = 1.

(35) Increment k.

(36) When the row-direction expansion processing of the dot data C [j] [i] is completed, x + B [i] is set as a new x, i + 1 is set as a new i, and the next dot data C is set.
Prepare for [j] [i] row-direction enlargement processing.

If i = F in step 30,
The y-th row dot data D [y] [*] is expanded in the column direction by performing the following steps 37 to 40.

(37, 38) The number of repetitions k = 1,
While k <B [j], the processes of steps 39 and 40 below are repeated.

(39) D [y + k] [*] = D [y]
[*]

(40) Increment k.

When (38, 41) k = B [j], y + B [j] is set to a new y, j is incremented, and the row of the next dot data C [j] [i] is incremented. Preparation for the direction expansion processing is performed, and the process returns to step 28.

By the above processing, the pattern of any one character is enlarged by (X / F) × (X / F) times.

Various modifications of the present embodiment are possible. For example, in this embodiment, the column direction enlargement process is performed after performing the row direction enlargement process, but conversely, the row direction enlargement process may be performed after performing the column direction enlargement process, and both results are the same. Become. However, according to the present embodiment, the column-direction enlargement processing can be performed in byte units or word units, so the processing becomes faster. Further, only one of the vertical and horizontal directions may be enlarged, or the vertical enlargement ratio and the horizontal enlargement ratio may be different. Further, it goes without saying that the character pattern smoothing process may be performed after the character pattern enlargement process.

(3) Second Embodiment of Character Pattern Enlarging Device In the above embodiment, the case where the enlarging process is performed by the software configuration has been described, but it is also possible to perform the character pattern enlarging process by the hardware configuration. An example is shown below. FIG. 7 is a configuration diagram of the character pattern enlarging device. The processing content is substantially the same as that of the above-described embodiment, and the operation timing can be easily understood from the above-mentioned embodiment. Therefore, the operation timing will be briefly described.

The character code is loaded into the counter 45,
The character font memory 14 is addressed by the content of the counter 45, and the i-th row dot data C [i] [*] is read from the character font memory 14 and held in the shift register 46. This i has an initial value of 0 and the counter 4
It is incremented by supplying the clock φ1 to the clock input terminal CK of No. 5.

On the other hand, F and X are held in the registers 51 and 52, respectively. The arithmetic circuit 53 obtains the values of M and I such that X = I + FM and 0 ≦ I <F from these F and X, and stores them in the registers 54 and 55, respectively. The content I of the register 55 is supplied to the expansion table memory 15 via the decoder 56, and the expansion table memory 15 is addressed. The enlargement data A [I] [*] is read from the enlargement table memory 15, and the shift register 5
Held at 7.

The content M of the register 54 is loaded into the up / down counter 61, the most significant bit A [I] [j] of the shift register 57 is added to this M through the AND gate 58, and the up / down counter 61 is loaded. Content is B
[J] = M + A [I] [j]. This j is incremented by supplying the clock φ2 to the shift register 57 and shifting it by 1 bit in the upper direction.

The contents of the up / down counter 61 are decremented by the clock φ3 every time the following 1 dot enlargement processing in the row direction or 1 dot enlargement processing in the column direction is performed.

The non-zero detection circuit 62 checks whether or not the content of the up / down counter 61 is 0, and supplies 1 to the one input terminal of the AND gate 63 if not 0 and 0 if 0. The clock φ4 is supplied to the other input terminal of the AND gate 63, and while the content of the up / down counter 61 is positive, the clock φ4 is supplied to the shift register 65 as a shift pulse through the AND gate 63 and the switching circuit 64. It The most significant bit C [i] [k] of the contents of the shift register 46 is supplied to the shift register 65, and this bit is expanded by the clock φ4 and held in the shift register 65. k is the clock φ6
Is supplied to the shift register 46 as a shift pulse via the AND gate 66, and is incremented. The AND gate 66 is opened / closed by a signal obtained by inverting the output of the non-zero detection circuit 62 by the inverter 67.
Therefore, when the count value of the up / down counter 61 becomes 0, the shift register 46 is shifted by 1 bit in the upper direction.

In this way, C [i] [*] is expanded in the row direction, and the shift register 6 is obtained as D [i] [*].
Held at 5.

Next, after B [i] is held in the up / down counter 61 in the same manner as described above, the switching circuit 64 is switched by the clock φ5 and the clock φ4 is supplied to the row shift control circuit 68. Row shift control circuit 68
Shifts the contents of the enlarged character pattern memory 60 in the column direction row by row every time the clock φ4 is supplied, and shifts the contents of the shift register 65 to the enlarged character pattern memory 60.
The contents of the shift register 65 are expanded in the column direction by holding the contents of the shift register 65 in the first row.

Such processing is performed by C [i] [*], i = 0
Repeatedly for ~ F-1, one side is X /
The character pattern data D enlarged M times is obtained in the enlarged character pattern memory 60.

Note that this hardware configuration also
A modification similar to the modification of the software configuration described in the latter part of the first embodiment of the character pattern enlarging device is considered,
This device is included in the invention.

[0056]

As described above, the method and apparatus for enlarging a character pattern according to the present invention has an excellent effect that the character pattern data can be enlarged to an arbitrary magnification using a small amount of enlargement data. It greatly contributes to improving the expressiveness of characters for display or printing on a computer or word processor.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is an explanatory diagram of an embodiment of a character pattern enlarging method.

FIG. 3 is a line direction enlarged explanatory diagram of one line of a character pattern.

FIG. 4 is a pattern diagram of an expansion table for 24 × 24 dot characters.

FIG. 5 is a hardware schematic configuration diagram of a first embodiment to which a character pattern enlarging device is applied.

FIG. 6 is a flowchart showing a character pattern enlargement processing procedure.

FIG. 7 is a configuration diagram of a second embodiment of a character pattern enlarging device.

FIG. 8 is an explanatory diagram of a conventional character pattern enlarging method.

[Explanation of symbols]

 A enlargement table B enlargement ratio data C, D character pattern data 14 character font memory 15 enlargement table 45 counter 46, 57, 65 shift register 51, 52, 54, 55 register 53 arithmetic circuit 56 decoder 60 enlarged character pattern memory 61 up / down Counter 68 line shift control circuit

Claims (3)

[Claims] 1. To expand character pattern data of F dots in one direction to character pattern data of X dots in one direction, values of M and I such that X = FM + I, 0 ≦ I <F are obtained, and before expansion. Of the F dots in the one direction of
A character pattern enlarging method characterized by multiplying and multiplying the remaining I dots by M + 1. 2. For each value of I, an enlargement table is created in advance that defines dots for multiplying M times and dots for multiplying M + 1 with respect to an arbitrary value M, and referring to the enlargement table, The method of enlarging a character pattern according to claim 1, wherein the enlarging magnification of the dots is determined. 3. An arithmetic means for obtaining the values of M and I such that X = FM + I, 0 ≦ I <F, in order to expand the character pattern data of F dots in one direction to the character pattern data of X dots in one direction. 1) and enlargement table storage means (2) in which an enlargement table defining a dot to be multiplied by M and a dot to be multiplied by M + 1 with respect to an arbitrary value M is stored, and the enlargement table is referred to. , Enlargement factor determining means (3) for determining dots to be multiplied by M and dots to be multiplied by M + 1, and character font storage means (4) for storing pattern data of each character and converting a character code into character pattern data.
And a magnifying means (5) for magnifying each dot of the converted character pattern data to the determined magnification, the character pattern magnifying device.